CN111018548A - Recycling method of waste refractory material - Google Patents
Recycling method of waste refractory material Download PDFInfo
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- CN111018548A CN111018548A CN201911178045.7A CN201911178045A CN111018548A CN 111018548 A CN111018548 A CN 111018548A CN 201911178045 A CN201911178045 A CN 201911178045A CN 111018548 A CN111018548 A CN 111018548A
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- 239000011819 refractory material Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000002699 waste material Substances 0.000 title claims abstract description 24
- 238000004064 recycling Methods 0.000 title claims abstract description 20
- 239000008187 granular material Substances 0.000 claims abstract description 66
- 239000011148 porous material Substances 0.000 claims abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 42
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 36
- 239000000463 material Substances 0.000 claims description 30
- 239000002245 particle Substances 0.000 claims description 30
- 229920005989 resin Polymers 0.000 claims description 30
- 239000011347 resin Substances 0.000 claims description 30
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 24
- 239000000843 powder Substances 0.000 claims description 24
- 239000011449 brick Substances 0.000 claims description 23
- 239000010439 graphite Substances 0.000 claims description 18
- 229910002804 graphite Inorganic materials 0.000 claims description 18
- 229910052742 iron Inorganic materials 0.000 claims description 18
- 239000002994 raw material Substances 0.000 claims description 18
- 229920001187 thermosetting polymer Polymers 0.000 claims description 18
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 12
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical class OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 12
- 239000010426 asphalt Substances 0.000 claims description 12
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 12
- 229910052593 corundum Inorganic materials 0.000 claims description 12
- 239000010431 corundum Substances 0.000 claims description 12
- 239000000395 magnesium oxide Substances 0.000 claims description 12
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 12
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 12
- 239000002184 metal Chemical class 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 12
- 239000002006 petroleum coke Substances 0.000 claims description 12
- 239000005011 phenolic resin Substances 0.000 claims description 12
- 229920001568 phenolic resin Polymers 0.000 claims description 12
- 239000000377 silicon dioxide Substances 0.000 claims description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 11
- 235000012239 silicon dioxide Nutrition 0.000 claims description 9
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 6
- 239000007767 bonding agent Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000005470 impregnation Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 239000004615 ingredient Substances 0.000 claims description 6
- 238000007885 magnetic separation Methods 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 238000007670 refining Methods 0.000 claims description 6
- 239000012266 salt solution Substances 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 6
- 238000005245 sintering Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 5
- 238000009628 steelmaking Methods 0.000 abstract description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 239000002910 solid waste Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
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Abstract
The invention relates to a method for recycling waste refractory materials, which reasonably utilizes the waste refractory materials, reduces the environmental pollution, and greatly reduces the cost of the refractory materials and the steel-making cost. In addition, through the strength treatment process, the pores of the granules are reduced, so that the strength of the granules is improved, the recycling performance of the granules is improved, and the recycling rate of the waste refractory material can reach more than 95%.
Description
Technical Field
The invention relates to the technical field of recycling of steelmaking refractory materials, in particular to a recycling method of waste refractory materials.
Background
The definition of solid waste is clear from the national solid waste pollution control law, wherein the refractory material formed into solid waste belongs to the category of industrial solid waste. A large amount of waste refractory materials are generated every year, a certain amount of waste refractory materials are recycled, a large amount of waste refractory materials are still treated in a burying mode, the treatment mode is simple and rough, a large amount of arable land is occupied, a lot of acidic or alkaline refractory materials cause permanent pollution to underground water resources, and the ecological balance of soil is greatly damaged. However, the recovery utilization rate of the existing waste refractory materials is low, the performance of the waste refractory materials cannot be guaranteed, and the use requirements cannot be well met.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a method for recycling waste refractory materials.
In order to achieve the purpose, the invention adopts the following technical scheme: a method for recycling waste refractory materials is characterized by comprising the following steps:
(1) selecting materials: selecting satisfactory ladle bricks, revolving bricks, blast furnace taphole materials and refining furnace refractory materials;
(2) crushing:
a, coarse crushing: roughly crushing the raw materials by using a jaw crusher, conveying the raw materials to a vibrating screen by using a belt conveyor for screening, and selecting granular materials with the grain diameter of below 15 mm;
b, fine crushing: finely crushing the granules with the particle size of more than 15mm by using a hammer type crusher, and crushing by using an impact crusher to ensure that the particle size of the granules is less than 4 mm;
(3) and (3) strength treatment: the method comprises the following steps of (1) carrying out oxidation treatment on the granular materials, then carrying out vacuum impregnation on the granular materials by using phosphoric acid, metal salt solution, silica sol or metal organic matters and the like to enable an impregnant to enter pores of the granular materials, and then carrying out curing or high-temperature treatment to reduce the pores of the granular materials so as to improve the strength of the granular materials;
(4) iron removal: carrying out magnetic separation on the granular material obtained in the step (3) to remove iron impurities;
(5) preparing materials: burdening the particle materials subjected to iron removal in the step (4); the ingredients of the composition are composed of the following components by weight: 90-100 parts of granules, 6 parts of petroleum coke powder, 1 part of silica micro powder, 3 parts of barite powder, 13-15 parts of thermosetting resin, 3 parts of magnesium oxide, 2 parts of aluminum oxide, 3 parts of graphite, 10 parts of corundum powder and 6 parts of asphalt, then adding the raw materials into a mixing roll for mixing, and mixing for 40-60min at the temperature of 90-100 ℃;
(6) high-pressure forming: and (4) performing high-pressure forming on the mixture obtained in the step (5), sintering in a high-temperature tunnel kiln at 1300-1400 ℃, preserving heat for 5-8h, and cooling to obtain the regenerated high-alumina brick.
In the step (5), the feeding sequence is as follows: adding a particle material, adding thermosetting resin, sequentially adding 6 parts of petroleum coke powder, 1 part of silicon dioxide micro powder, 3 parts of barite powder, 3 parts of magnesium oxide, 2 parts of aluminum oxide, 3 parts of graphite and 6 parts of asphalt, and finally adding corundum powder and a bonding agent.
In the step (5), the thermosetting resin is T60 carbon-containing resin and phenolic resin.
In the step (5), the mass part ratio of the T60 carbon-containing resin to the phenolic resin is 1: 3.
in the step (5), the particle size of the graphite is 50-150 meshes.
In the step (6), the pressure range of the high-pressure molding is 200-260MPa, and the high-alumina brick prepared in the pressure range has high volume density and good performance.
The invention reasonably utilizes the waste refractory material, not only reduces the environmental pollution, but also greatly reduces the cost of the refractory material and the steel-making cost. In addition, through the strength treatment process, the pores of the granules are reduced, so that the strength of the granules is improved, the recycling performance of the granules is improved, and the recycling rate of the waste refractory material can reach more than 95%.
Detailed Description
The invention will be further illustrated with reference to specific examples:
a method for recycling waste refractory materials is characterized by comprising the following steps:
(1) selecting materials: selecting satisfactory ladle bricks, revolving bricks, blast furnace taphole materials and refining furnace refractory materials;
(2) crushing:
a, coarse crushing: roughly crushing the raw materials by using a jaw crusher, conveying the raw materials to a vibrating screen by using a belt conveyor for screening, and selecting granular materials with the grain diameter of below 15 mm;
b, fine crushing: finely crushing the granules with the particle size of more than 15mm by using a hammer type crusher, and crushing by using an impact crusher to ensure that the particle size of the granules is less than 4 mm;
(3) and (3) strength treatment: the method comprises the following steps of (1) carrying out oxidation treatment on the granular materials, then carrying out vacuum impregnation on the granular materials by using phosphoric acid, metal salt solution, silica sol or metal organic matters and the like to enable an impregnant to enter pores of the granular materials, and then carrying out curing or high-temperature treatment to reduce the pores of the granular materials so as to improve the strength of the granular materials;
(4) iron removal: carrying out magnetic separation on the granular material obtained in the step (3) to remove iron impurities;
(5) preparing materials: burdening the particle materials subjected to iron removal in the step (4); the ingredients of the composition are composed of the following components by weight: 90-100 parts of granules, 6 parts of petroleum coke powder, 1 part of silica micro powder, 3 parts of barite powder, 13-15 parts of thermosetting resin, 3 parts of magnesium oxide, 2 parts of aluminum oxide, 3 parts of graphite, 10 parts of corundum powder and 6 parts of asphalt, then adding the raw materials into a mixing roll for mixing, and mixing for 40-60min at the temperature of 90-100 ℃;
(6) high-pressure forming: and (4) performing high-pressure forming on the mixture obtained in the step (5), sintering in a high-temperature tunnel kiln at 1300-1400 ℃, preserving heat for 5-8h, and cooling to obtain the regenerated high-alumina brick.
In the step (5), the feeding sequence is as follows: adding a particle material, adding thermosetting resin, sequentially adding 6 parts of petroleum coke powder, 1 part of silicon dioxide micro powder, 3 parts of barite powder, 3 parts of magnesium oxide, 2 parts of aluminum oxide, 3 parts of graphite and 6 parts of asphalt, and finally adding corundum powder and a bonding agent.
In the step (5), the thermosetting resin is T60 carbon-containing resin and phenolic resin.
In the step (5), the mass part ratio of the T60 carbon-containing resin to the phenolic resin is 1: 3.
in the step (5), the particle size of the graphite is 50-150 meshes.
In the step (6), the pressure range of the high-pressure molding is 200-260MPa, and the high-alumina brick prepared in the pressure range has high volume density and good performance.
Example 1:
a method for recycling waste refractory materials is characterized by comprising the following steps:
(1) selecting materials: selecting satisfactory ladle bricks, revolving bricks, blast furnace taphole materials and refining furnace refractory materials;
(2) crushing:
a, coarse crushing: roughly crushing the raw materials by using a jaw crusher, conveying the raw materials to a vibrating screen by using a belt conveyor for screening, and selecting granular materials with the grain diameter of below 15 mm;
b, fine crushing: finely crushing the granules with the particle size of more than 15mm by using a hammer type crusher, and crushing by using an impact crusher to ensure that the particle size of the granules is less than 4 mm;
(3) and (3) strength treatment: the method comprises the following steps of (1) carrying out oxidation treatment on the granular materials, then carrying out vacuum impregnation on the granular materials by using phosphoric acid, metal salt solution, silica sol or metal organic matters and the like to enable an impregnant to enter pores of the granular materials, and then carrying out curing or high-temperature treatment to reduce the pores of the granular materials so as to improve the strength of the granular materials;
(4) iron removal: carrying out magnetic separation on the granular material obtained in the step (3) to remove iron impurities;
(5) preparing materials: burdening the particle materials subjected to iron removal in the step (4); the ingredients of the composition are composed of the following components by weight: 100 parts of granules, 6 parts of petroleum coke powder, 1 part of silicon dioxide micro powder, 3 parts of barite powder, 15 parts of thermosetting resin, 3 parts of magnesium oxide, 2 parts of aluminum oxide, 3 parts of graphite, 10 parts of corundum powder and 6 parts of asphalt, and then adding the raw materials into a mixing mill for mixing for 60min at the temperature of 100 ℃;
(6) high-pressure forming: and (4) performing high-pressure forming on the mixture obtained in the step (5), sintering in a high-temperature tunnel kiln at 1400 ℃, preserving heat for 5 hours, and cooling to obtain the regenerated high-alumina brick.
In the step (5), the feeding sequence is as follows: adding a particle material, adding thermosetting resin, sequentially adding 6 parts of petroleum coke powder, 1 part of silicon dioxide micro powder, 3 parts of barite powder, 3 parts of magnesium oxide, 2 parts of aluminum oxide, 3 parts of graphite and 6 parts of asphalt, and finally adding corundum powder and a bonding agent.
In the step (5), the thermosetting resin is T60 carbon-containing resin and phenolic resin.
In the step (5), the mass part ratio of the T60 carbon-containing resin to the phenolic resin is 1: 3.
in the step (5), the particle size of the graphite is 150 meshes.
In the step (6), the pressure range of high-pressure molding is 260MPa, and the high-alumina brick prepared in the pressure range has high volume density and good performance.
Example 2:
a method for recycling waste refractory materials is characterized by comprising the following steps:
(1) selecting materials: selecting satisfactory ladle bricks, revolving bricks, blast furnace taphole materials and refining furnace refractory materials;
(2) crushing:
a, coarse crushing: roughly crushing the raw materials by using a jaw crusher, conveying the raw materials to a vibrating screen by using a belt conveyor for screening, and selecting granular materials with the grain diameter of below 15 mm;
b, fine crushing: finely crushing the granules with the particle size of more than 15mm by using a hammer type crusher, and crushing by using an impact crusher to ensure that the particle size of the granules is less than 4 mm;
(3) and (3) strength treatment: the method comprises the following steps of (1) carrying out oxidation treatment on the granular materials, then carrying out vacuum impregnation on the granular materials by using phosphoric acid, metal salt solution, silica sol or metal organic matters and the like to enable an impregnant to enter pores of the granular materials, and then carrying out curing or high-temperature treatment to reduce the pores of the granular materials so as to improve the strength of the granular materials;
(4) iron removal: carrying out magnetic separation on the granular material obtained in the step (3) to remove iron impurities;
(5) preparing materials: burdening the particle materials subjected to iron removal in the step (4); the ingredients of the composition are composed of the following components by weight: 90 parts of granules, 6 parts of petroleum coke powder, 1 part of silicon dioxide micro powder, 3 parts of barite powder, 13 parts of thermosetting resin, 3 parts of magnesium oxide, 2 parts of aluminum oxide, 3 parts of graphite, 10 parts of corundum powder and 6 parts of asphalt, and then adding the raw materials into a mixing mill for mixing for 40min at the temperature of 90 ℃;
(6) high-pressure forming: and (5) performing high-pressure forming on the mixture obtained in the step (5), sintering in a high-temperature tunnel kiln at 1300 ℃, preserving heat for 8 hours, and cooling to obtain the regenerated high-alumina brick.
In the step (5), the feeding sequence is as follows: adding a particle material, adding thermosetting resin, sequentially adding 6 parts of petroleum coke powder, 1 part of silicon dioxide micro powder, 3 parts of barite powder, 3 parts of magnesium oxide, 2 parts of aluminum oxide, 3 parts of graphite and 6 parts of asphalt, and finally adding corundum powder and a bonding agent.
In the step (5), the thermosetting resin is T60 carbon-containing resin and phenolic resin.
In the step (5), the mass part ratio of the T60 carbon-containing resin to the phenolic resin is 1: 3.
in the step (5), the particle size of the graphite is 50 meshes.
In the step (6), the pressure range of high-pressure forming is 200Mpa, and the high-alumina brick prepared in the pressure range has high volume density and good performance.
Example 3:
a method for recycling waste refractory materials is characterized by comprising the following steps:
(1) selecting materials: selecting satisfactory ladle bricks, revolving bricks, blast furnace taphole materials and refining furnace refractory materials;
(2) crushing:
a, coarse crushing: roughly crushing the raw materials by using a jaw crusher, conveying the raw materials to a vibrating screen by using a belt conveyor for screening, and selecting granular materials with the grain diameter of below 15 mm;
b, fine crushing: finely crushing the granules with the particle size of more than 15mm by using a hammer type crusher, and crushing by using an impact crusher to ensure that the particle size of the granules is less than 4 mm;
(3) and (3) strength treatment: the method comprises the following steps of (1) carrying out oxidation treatment on the granular materials, then carrying out vacuum impregnation on the granular materials by using phosphoric acid, metal salt solution, silica sol or metal organic matters and the like to enable an impregnant to enter pores of the granular materials, and then carrying out curing or high-temperature treatment to reduce the pores of the granular materials so as to improve the strength of the granular materials;
(4) iron removal: carrying out magnetic separation on the granular material obtained in the step (3) to remove iron impurities;
(5) preparing materials: burdening the particle materials subjected to iron removal in the step (4); the ingredients of the composition are composed of the following components by weight: 95 parts of granules, 6 parts of petroleum coke powder, 1 part of silicon dioxide micro powder, 3 parts of barite powder, 14 parts of thermosetting resin, 3 parts of magnesium oxide, 2 parts of aluminum oxide, 3 parts of graphite, 10 parts of corundum powder and 6 parts of asphalt, and then adding the raw materials into a mixing mill for mixing, and mixing for 55min at the temperature of 95 ℃;
(6) high-pressure forming: and (4) performing high-pressure forming on the mixture obtained in the step (5), sintering in a high-temperature tunnel kiln at 1350 ℃, preserving heat for 7 hours, and cooling to obtain the regenerated high-alumina brick.
In the step (5), the feeding sequence is as follows: adding a particle material, adding thermosetting resin, sequentially adding 6 parts of petroleum coke powder, 1 part of silicon dioxide micro powder, 3 parts of barite powder, 3 parts of magnesium oxide, 2 parts of aluminum oxide, 3 parts of graphite and 6 parts of asphalt, and finally adding corundum powder and a bonding agent.
In the step (5), the thermosetting resin is T60 carbon-containing resin and phenolic resin.
In the step (5), the mass part ratio of the T60 carbon-containing resin to the phenolic resin is 1: 3.
in the step (5), the particle size of the graphite is 100 meshes.
In the step (6), the pressure range of high-pressure molding is 230Mpa, and the high-alumina brick prepared in the pressure range has high volume density and good performance.
The present invention has been described in connection with the specific embodiments, and it is obvious that the specific implementation of the present invention is not limited by the above-mentioned manner, and it is within the protection scope of the present invention as long as various modifications are made by using the method concept and technical solution of the present invention, or the present invention is directly applied to other occasions without modification.
Claims (6)
1. A method for recycling waste refractory materials is characterized by comprising the following steps:
(1) selecting materials: selecting satisfactory ladle bricks, revolving bricks, blast furnace taphole materials and refining furnace refractory materials;
(2) crushing:
a, coarse crushing: roughly crushing the raw materials by using a jaw crusher, conveying the raw materials to a vibrating screen by using a belt conveyor for screening, and selecting granular materials with the grain diameter of below 15 mm;
b, fine crushing: finely crushing the granules with the particle size of more than 15mm by using a hammer type crusher, and crushing by using an impact crusher to ensure that the particle size of the granules is less than 4 mm;
(3) and (3) strength treatment: the method comprises the following steps of (1) carrying out oxidation treatment on the granular materials, then carrying out vacuum impregnation on the granular materials by using phosphoric acid, metal salt solution, silica sol or metal organic matters and the like to enable an impregnant to enter pores of the granular materials, and then carrying out curing or high-temperature treatment to reduce the pores of the granular materials so as to improve the strength of the granular materials;
(4) iron removal: carrying out magnetic separation on the granular material obtained in the step (3) to remove iron impurities;
(5) preparing materials: burdening the particle materials subjected to iron removal in the step (4); the ingredients of the composition are composed of the following components by weight: 90-100 parts of granules, 6 parts of petroleum coke powder, 1 part of silica micro powder, 3 parts of barite powder, 13-15 parts of thermosetting resin, 3 parts of magnesium oxide, 2 parts of aluminum oxide, 3 parts of graphite, 10 parts of corundum powder and 6 parts of asphalt, then adding the raw materials into a mixing roll for mixing, and mixing for 40-60min at the temperature of 90-100 ℃;
(6) high-pressure forming: and (4) performing high-pressure forming on the mixture obtained in the step (5), sintering in a high-temperature tunnel kiln at 1300-1400 ℃, preserving heat for 5-8h, and cooling to obtain the regenerated high-alumina brick.
2. The recycling method of the waste refractory material as claimed in claim 1, wherein in the step (5), the feeding sequence is as follows: adding a particle material, adding thermosetting resin, sequentially adding 6 parts of petroleum coke powder, 1 part of silicon dioxide micro powder, 3 parts of barite powder, 3 parts of magnesium oxide, 2 parts of aluminum oxide, 3 parts of graphite and 6 parts of asphalt, and finally adding corundum powder and a bonding agent.
3. The recycling method of waste refractory materials as claimed in claim 2, wherein in the step (5), the thermosetting resin is T60 carbon-containing resin and phenolic resin.
4. The method for recycling the waste refractory material as claimed in claim 3, wherein in the step (5), the ratio of the T60 carbon-containing resin to the phenolic resin in parts by weight is 1: 3.
5. the recycling method of waste refractory materials according to claim 1, wherein in the step (5), the particle size of graphite is 50-150 meshes.
6. The method as claimed in claim 1, wherein the pressure for high pressure molding in step (6) is 200-260 Mpa.
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